Jack sinker of special shape for knitting frames



Dec. 10, 1929. F. TAUSCHER v13733351 JACK SINKER 0F PECIAL SHAPE FOR KNITTING FRAMES Filed Dec. 1927 $2 veniar'x Patented Dec. 10, 1929 UNITED STATES PATENT; OFFICE rnrrz 'ransonmt, or OBERLUITGWITZ, GERMANY Application filed December 5, 1927, Serial No. 237,705, and in Germany January 8, 1927.

lit has been proposed to make jack-sinkers ofknitting frames with ashort nose and shorter front-part for reducing the distance through which thesinker has to travel in its reciprocatory movement, thereby increasing the efliciency of the knitting-machine.

It has further been proposed to arrange the point of the sinker-nose farther back than usual, but in this case however the boundaryn line of the ,sinker-nose is so steep that the Weals are not properly held, and therefore sometimes loops are slipped with the result that the fabric produced is defective.

According to the invention the point of it the sinker-nose is disposed farther back than usual but the boundary-line of the nose, instead of being a straight line, is a broken or curved line, the lower portion of which has the same inclination as the front edge of an an ordinary jack-sinker.

An embodiment of the invention is illustrated, by way of example, in the accompanyin drawing, in which: i

in. 1 shows a side-elevation of the irn- 2 proved sinker.

Fig. 2 is a side-elevation, showing the head of the improved sinker on an enlarged scale.

The front-portion of ordinary sinkers is so long that the thread-guides deposit the thread to in front of the point 1 of the nose 2 of the v jack-sinker and the front-portion still stands between the needles 3 of the knitting frame, when the sinker is in the retracted position. The effect of this is to produce a definite path at from w to y.

, In order to reduce this path of travel it has been proposed, to make the boundary-line of'the sinker-nose steeper, i. e. to place the nose 2 farther back. This form of constructtl tion has the disadvantage however that the sunk loop does not have suflicient hold on the ,steep edge 5 and slips upward so thatthe fabric becomes defective. This construction has consequently not been adopted.

4: According to the invention the point 1 of the sinker-nose is also placed farther back, but the boundary-line of the nose is curved or broken so that the upper portion 5 being somew at steep, and the lower portion 5" being i clined in a rearward direction in is reduced by the distance which travel twice forward and twice backward to relation to the part 5 so that the loop finds sufficient hold on said lower part 5".

The front part 6 of a sinker which has a nose of this shape, is shortened adcordingly, and the distance over which the sinker travels the point 1 of nose 2 is set back. Owing to this reduction in the distance to he traveled, the frame can be run more rapidly, as each sinker has to form one loop, sothat the travel is reduced four times the distance of which the point 1 is placed farther back. The inclined portion 5" of the front of the nose prevents displacement of the weals. The efficiency of the machine is considerably increased.

I claim:

Jack sinker for knitting frames in which the boundary line of the upper sinker-nose from the throat down to the front nose-point is so formed that the lower portion of said boundary line is inclined at a lesser angle to the lower edge of the sinker than the upper portion along the corresponding section.

In testimony whereof I aflix my signature. 75

FRITZ TAUStlHEBZ. 

